DE102009004732A1 - Disk i.e. windscreen, for e.g. aircraft, has daylight blocker exhibiting transmission for light of preset wavelength less than preset percentage and for light of wavelength of preset greater than preset percentage - Google Patents

Abstract

The disk has a disk segment (7) with an upper disk (1), and an intermediate layer (3) with an optical transparent adhesive foil (4a). A daylight blocker (5) exhibits transmission for light of wavelength 300 nm to 800 nm less than 10 percentage and for light of wavelength of 800 to 1000 nm greater than 20 percentage. The daylight blocker is made of polymer such as polybutylenterephthalate, polycarbonate, polyethylenterephthalate, ethylvinylacetate and polyvinylbutyral and/or blockpolymer or copolymer. The upper disk and a lower disk (2) are made of flat glass and polymethylmethacrylate. An independent claim is also included for a method for manufacturing a disk.

Description

The The invention relates to a disc having a daylight absorbing Disc segment, a process for their preparation and their use.

Lots Vehicles, planes, helicopters and ships are with different ones equipped with optical sensors. Examples of optical Sensors are camera systems such as video cameras, night vision cameras, Residual amplifiers or passive infrared detectors such as FLIR (Forward Looking Infrared). The camera systems can do this Light in the ultraviolet (UV), visible (VIS) and infrared wavelengths (IR) use. This can be used even in bad weather conditions like darkness and fog, objects, vehicles as well Recognize people precisely. Also in the automotive sector can these camera systems in motor vehicles behind the windshield be placed in the passenger compartment. The camera systems also offer in road traffic the possibility of dangerous situations and To recognize obstacles in time.

Further Applications for optical sensors are in the electronic Distance measurement (EDM), for example with the help of laser rangefinders. Here, for example, the distance to other vehicles be determined. Such systems are in the military Scope widely used, but also in the civilian area There are many possible applications. By distance measurements to the vehicle in front can be the necessary Determine safety distance and thus the traffic safety clearly increase. In automatic warning systems decreases thus the danger of a collision clearly.

The Operation and sensitivity of such sensors, in particular in systems that use infra-red radiation is also very strong of electromagnetic radiation of other wavelengths affected. So larger proportions used ultraviolet and visible light the sensitivity of the sensor clearly down. This complicates especially during the day and in the Twilight hours the use of such systems. moreover Different windshield lenses have different absorption and transmission values, so that the sensor systems, for example IR cameras, individually adapted for each type of glass Need to become. This adaptation is difficult in practice make.

The US 2003/0059218 A1 discloses a sensor in the passenger compartment of a vehicle. The sensor is arranged in a panel behind the windshield of the vehicle. In order to prevent the sensor from coming into contact with dust particles, the screen can be equipped with a filter system. At the same time, the air exchange through the filter prevents fogging of the sensor. This can be placed behind the windshield so that the wipers keep the visual field of the sensor clean.

The US 2003/0010890 A1 discloses a sensor behind the windshield of a vehicle. The actual sensor is arranged in a panel. This reduces the occurrence of disturbing reflections. An arranged in the panel glass directs the incident beam path to the sensor. In a preferred embodiment, the glass pane arranged in the panel can be arranged so that interfering light components are deflected or absorbed.

The Invention has the task of the sensitivity of a behind the Improve pane mounted sensor. It should as possible high proportions of the electromagnetic wavelengths used Sensor reach while disturbing electromagnetic Wavelengths are retained. Farther the sensor must also be used with different windscreen lenses Can be used without complicated readjustment of the sensor be.

The Object of the present invention is achieved by a disk with a daylight absorbing disk segment according to the independent claims 1, 12, 13 and 14 solved. Preferred embodiments go from the Subclaims forth.

The Disc according to the invention with integrated disc segment includes an upper disc, an intermediate layer and a lower one Disc. The intermediate layer comprises at least one optically transparent Adhesive foil and a daylight blocker. The daylight blocker can as a semitransparent film as well as in the form of a semitransparent body be educated. Semitransparent means in this context high transmission values for those detected by the sensor electromagnetic radiation and / or high absorption values at the same time for the interfering radiation not used by the sensor. The daylight blocker includes both organic and inorganic Polymers as well as inorganic crystals that described above Show absorption behavior. The size of the daylight blocker depends on the size of the sensor and the associated light incident surface. The one facing the light Surface of the daylight blocker preferably corresponds more than 50%, more preferably more than 75% of the surface of the disk segment.

The interlayer may be one or more Adhesive films contain, in which the daylight blocker is inserted. As adhesive films, transparent polymers such as PVB (polyvinyl butyral), EVA (ethylene vinyl acetate) or optically transparent adhesives may be used. The daylight blocker is then completed by either an adhesive film or the lower disc and / or upper disc to the outside.

The entire disc segment is located in a recess of the windshield, so that the sensor is independent of the windshield glass, or applied thereto coatings operate.

Of the Daylight blocker preferably has a transmission for Light of wavelength 300 nm to 800 nm of <10% and for Light of wavelength from 800 nm to 1000 nm of> 20%. The daylight blocker preferably absorbs most of the visible Light from 300 nm to 800 nm and leaves the same time most of the infra-red radiation to the sensor happen.

Of the Daylight blocker particularly preferably has a transmission for Light of wavelength 380 nm to 880 nm of <5%, preferably <0.1%.

Of the Daylight blocker preferably has a transmission for Light of wavelength 880 nm to 920 nm of> 50%, preferably> 85%.

Of the Daylight blocker preferably comprises at least one polymer, especially preferably PBT (polybutylene terephthalate), PC (polycarbonate), PET (polyethylene terephthalate), EVA (ethyl vinyl acetate), PVB (polyvinyl butyral) and / or block polymers or copolymers thereof.

The optically transparent adhesive film preferably comprises an upper optical transparent adhesive film and a lower optically transparent adhesive film. This makes the daylight blocker like a sandwich fix in the intermediate layer. Since the adhesive film is flexible, is the risk of damaging the daylight blocker minimized when laminating the disk segment.

The Intermediate layer is preferably embedded in an adhesive film. The Intermediate layer consisting of adhesive film and Tageslichtblocker can also in a Ausparrung the adhesive film between the upper and lower Disc are used. The intermediate layer is particularly preferred as a trilayer of upper adhesive film, daylight blocker and lower adhesive film inserted into the adhesive film. The intermediate layer leaves be prefabricated in this way as a module.

The upper disc and / or lower disc preferably comprise one of the following materials: glass and / or polymer, particularly preferred Flat glass and / or polymethylmethacrylate.

The disk segment preferably contains a soil-repellent coating, more preferably a hydrophobic coating. This increases the contact angle of polar liquids such as water on the surface of the discs and thus reduces the wetting of the surface. The liquid drains faster and cleans the surface. Corresponding coatings may contain hydrophobic silanes, such as alkylalcohol or alkylchlorosilanes, for example octyltrimethoxysilane. In addition, TiO ₂ particles can be applied to the surface. These decompose catalytically under organic sunlight organic dirt particles on the disk surface. Examples of such coatings are also disclosed in the patent applications EP 0 850 204 A1 and EP 0 927 144 A1 disclosed. The coatings are preferably applied to the upper disk and / or lower disk of the disk segment.

The disk segment preferably has an area of from 1 cm ² to 10 000 cm ² , more preferably from 50 cm ² to 1000 cm ² , particularly preferably from 100 cm ² to 500 cm ² . The area depends essentially on the beam path emanating from the sensor, in particular the size of the pane area, which must be permeable to the corresponding electromagnetic radiation.

The Disc segment preferably has a circular, elliptical, rectangular or trapezoidal shape. The form aligns It is particularly preferred according to the form of the above-described Beam path of the sensor.

The The invention further includes a method of manufacture a disk segment according to the invention. A upper disk, an adhesive film, a daylight blocker and a lower one Disc are connected and then laminated. The lamination is preferably carried out in an autoclave. Typical temperature ranges are at 100 ° C to 150 ° C, typical pressures from 6 bar to 12 bar. The lamination typically lasts from 65 min to 180 min. The slice segment thus produced can subsequently in the disc according to the invention, for example be inserted into the windshield of a vehicle.

The manufacture of a disk according to the invention may also comprise the following steps. First, the adhesive sheets and the daylight blocker are bonded to the intermediate layer. This module thus produced can then be inserted into a previously cut-out adhesive film. The adhesive film comes with an upper disc and lower Disc bonded and laminated in an autoclave at 65 ° C to 180 ° C and 6 bar to 12 bar for 65 min to 180 min.

The The invention further encompasses the use of the invention Washer in conjunction with an optical sensor in vehicles, aircraft, Helicopters and ships. The optical sensor is behind the disc segment of the disc according to the invention arranged. This can be in the for the sensor relevant wavelength range of the disk the transmission and Absorption of electromagnetic radiation in dependence set by the sensor used. The entire pane dimensions and a possible sheathing of the disc and the sensor depend on the respective field of application. Possible is an external attachment or an internal arrangement in the vehicle interior.

The Slice is preferred as a windshield of a vehicle, especially preferably a passenger car or truck used.

The Disk is preferred in another embodiment used as intensity reducer. This is the daylight blocker in the disk segment selected so that disturbing Wavelengths are reduced. The sensor can thus be independent be used by the disc used.

In the following, the invention is based on the 1 to 7 explained. The figures are purely schematic representations and are not to scale. They limit the invention in any way.

The The invention will be explained in more detail with reference to the drawings. Show it:

1 a schematic cross section of the disk segment according to the invention ( 7 )

2 a schematic cross section of a preferred embodiment of the disk segment according to the invention ( 7 )

3 a further schematic cross section of a preferred embodiment of the disk segment ( 7 )

4 a further schematic cross section of a preferred embodiment of the disk segment ( 7 )

5 a schematic view of the disc according to the invention ( 8th ).

6 a flow diagram of the process according to the invention for the production of the disk segment ( 7 )

7 1 is a flow chart of a preferred embodiment of the method according to the invention for producing the disk segment ( 7 )

1 shows a schematic cross section of the disk segment according to the invention ( 7 ).

Between an upper disc ( 1 ) and a lower disc ( 2 ) is the intermediate layer ( 3 ). This consists of at least one adhesive film ( 4a ) and the daylight blocker ( 5 ) together. In the simplest case, the daylight blocker ( 5 ) on the adhesive film ( 4a ) and between the upper disc ( 1 ) and lower disc ( 2 ) are laminated.

2 shows a further schematic cross section of a preferred embodiment of the disk segment according to the invention ( 7 ). Between an upper disc ( 1 ) and a lower disc ( 2 ) is the intermediate layer ( 3 ). This consists of two adhesive films ( 4a1 and 4a2 ) and the daylight blocker ( 5 ) together. The daylight blocker thus has no direct contact surface with the upper disk ( 1 ) and / or the lower disc ( 2 ).

3 shows in schematic construction a preferred embodiment of the disk segment ( 7 ). This is the daylight blocker ( 5 ) between two adhesive films ( 4a1 and 4a2 ) embedded as a module. This is again in an adhesive film ( 4 ), in which the corresponding recess has been cut. Adhesive films ( 4 ) and ( 4a1 . 4a2 ) contain the same and / or different materials, such as PVB and / or EVA. The adhesive film ( 4 ) is between an upper disc ( 1 ) and a lower disc ( 2 ) arranged.

4 shows in schematic construction a preferred embodiment of the disk segment ( 7 ). Between an upper disc ( 1 ) and a lower disc ( 2 ) is the intermediate layer ( 3 ). This consists of at least one adhesive film ( 4a ) and the daylight blocker ( 5 ) together. In the simplest case, the daylight blocker ( 5 ) on the adhesive film ( 4a ) and between the upper disc ( 1 ) and lower disc ( 2 ) are laminated. The upper disc ( 1 ) additionally has a dirt-repellent, hydrophobic coating ( 6 ) on. This preferably shows a comparable or the same transmission and absorption behavior as the daylight blocker ( 5 ).

5 shows a schematic view of the disc according to the invention ( 8th ). The arrangement and positioning of the disk segment ( 7 ) from the position of the sensor behind the disc ( 8th ) dependent.

6 1 shows a flow chart of the method according to the invention for producing the disk segment (FIG. 7 ). The process begins in step A) with a corresponding pretreatment of the pane, preferably glass pane, such as cutting, bending and the corresponding cleaning steps. The shape is dependent on the shape and geometry of the disc ( 8th ) into which the disk segment ( 7 ) should be used later. The resulting upper disc ( 1 ) and lower disc ( 2 ) later close the disk segment ( 7 ) outwards and inwards.

Then the daylight blocker ( 5 ) in step B). In the daylight blocker ( 5 ) may be a polymer block or a thin polymer film. Preferred film thicknesses are between 100 .mu.m and 1 cm.

In the following process step C), the upper disc ( 1 ), lower disc ( 2 ) and the daylight blocker ( 5 ) from step C) over the adhesive film ( 4a ) connected. The combined disc segment arrangement is then laminated in autoclave D) at 65 ° C to 180 ° C and 6 bar to 12 bar for 65 min to 180 min. The disk segment ( 7 ) can then be in a disc according to the invention ( 8th ), for example, a windshield can be used.

7 shows the Fliesschema a preferred embodiment of the method according to the invention. This begins as in 5 in step A) with a corresponding pretreatment of the discs ( 1 . 2 ), preferably glass panes, such as cutting, bending and the corresponding cleaning steps. As in the previous example, the shape in this example is dependent on the shape and geometry of the disc ( 8th ) into which the disk segment ( 7 ) should be used later. The resulting, cleaned, cleaned upper disc ( 1 ) and lower disc ( 2 ) later close the disk segment ( 7 ) to the outside. The intermediate layer ( 3 ) is then in step B) by embedding the Tageslichtblockers ( 5 ) in the adhesive films ( 4a1 and 4a2 ) receive. This three-layer body is cut in step C). The intermediate layer ( 3 ) is in the following step D) in an adhesive film ( 4 ) embedded. This receives a Ausparrung according to the size of the intermediate layer ( 3 ) into which the intermediate layer ( 3 ) is used. The described method enables the incorporation and integration of prefabricated interlayer elements in existing processes for producing laminated glass panes. The thus prepared adhesive film ( 4 ) will prepare between upper slice (in step A) 1 ) and lower disc ( 2 ) E) and in the autoclave F) at 65 ° C to 180 ° C and 6 bar to 12 bar for 65 min to 180 min laminated.

1

upper Disc,

2

lower Disc,

3

Intermediate layer,

4

Adhesive film,

4a

Adhesive film,

4a1

upper Adhesive film,

4a2

lower Adhesive film,

5

Daylight blockers,

6

stain-resistant, hydrophobic coating,

7

Disk segment,

8th

Disc.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 2003/0059218 A1 [0005]
• US 2003/0010890 A1 [0006]
• EP 0850204 A1 [0019]
• - EP 0927144 A1 [0019]

Claims (16)

Disc with integrated disc segment comprising: a.) An upper disc ( 1 ), b.) an intermediate layer ( 3 ) comprising: b.1) an optically transparent adhesive film ( 4a ), b.2) a daylight blocker ( 5 ) and c.) a lower disc ( 2 ). A disc according to claim 1, wherein the daylight blocker ( 5 ) has a transmission for light of wavelength 300 nm to 800 nm of <10% and for light of the wavelength of 800 to 1000 nm of> 20%. A disc according to claim 2, wherein the daylight blocker ( 5 ) has a transmission for light of wavelength 380 nm to 880 nm of <5%, preferably <0.1%. A disc according to claim 2, wherein the daylight blocker ( 5 ) has a transmission for light of wavelength 880 nm to 920 nm of> 50%, preferably> 85%. A disc according to any one of claims 1 to 4, wherein the daylight blocker ( 5 ) comprises at least one polymer, preferably PBT, PC, PET, EVA, PVB and / or block polymers or copolymers thereof. Disc according to one of claims 1 to 5, wherein the optically transparent adhesive film ( 4a ) an upper optically transparent adhesive film ( 4a1 ) and a lower optically transparent adhesive film ( 4a2 ). Disc according to one of claims 1 to 6, wherein the intermediate layer ( 3 ) in an adhesive film ( 4 ) is embedded. Disc according to one of claims 1 to 7, wherein the upper disc ( 1 ) and / or the lower disc ( 2 ) comprise one of the materials glass and / or polymer, preferably flat glass and / or polymethyl methacrylate. A disc according to any one of claims 1 to 8, wherein the disc segment ( 7 ) has a hydrophobic and / or dirt-repellent coating. A disc according to any one of claims 1 to 9, wherein the disc segment ( 7 ) has an area of from 1 cm ² to 10000 cm ² , preferably from 50 cm ² to 1000 cm ² , particularly preferably from 100 cm ² to 500 cm ² . A disc according to any one of claims 1 to 10, wherein the disc segment ( 7 ) has a circular, elliptical, rectangular, or trapezoidal shape. A method of making a disk comprising: a.) Bonding an upper disk ( 1 ), an adhesive film ( 4a ), a daylight blocker ( 5 ), a lower disc ( 2 ) and b.) laminating the bonded parts in the autoclave. A method of making a disk comprising: a.) Bonding adhesive sheets ( 4a1 . 4a2 ) and daylight blocker ( 5 ) to the intermediate layer ( 3 ), b.) Cutting an adhesive film ( 4 ) and inserting the intermediate layer ( 3 ), c.) connecting an upper disc ( 1 ), lower disc ( 2 ), the adhesive film ( 4 ) and inserted intermediate layer ( 3 ) and d.) lamination of the bonded parts in the autoclave. Use of the disc according to one of the claims 1 to 11 in conjunction with an optical sensor in vehicles, Airplanes, helicopters and ships. Use of the disc according to claim 14 as a windshield of a vehicle. Use of the disc according to one of the claims 14 or 15 as intensity reducer.